If you were doing this though (using funds to mint other tokens to sell), the principle was clearly not in USD, so there was still a risk of the bottom falling out on whatever you were holding funds in.
You also can't really add "almost always" to "completely safe". It's either "completely safe", or it's not. This statement is just "it works 100% of the time 65% of the time", but with words rather than numbers.
"It's 'completely safe', until it's not" which is exactly the point that I and others in this thread started with.